Choose the correct words or phrases to complete the sentences. In a trainee-led class, students may be dismissive of their teachers’ orders and, ____, make teaching activities out of order.

Future employers will prefer job candidates who are familiar with dynamic learning. A: applicants B: employees C: trainee D: intern

Oneof the goals of the plan is to _______. A: develop the trainee’s managementskills B: promote the manager to a higher level C: improve the clerk’s skills incalculating

P0.0所控制LED被命名为LED。下面程序片段中()可以使LED闪烁两次。A.()LED=0；delay()；()B.()LED=0；delay()；LED=1；delay()；()C.()LED=0；delay()；LED=1；delay()；()LED=0；delay()；LED=1；delay()；()D.()LED=0；delay()()LED=1；delay()；()LED=0；delay()()LED=1；delay()；

LED=！LED的含义是（ ）。 A: 点亮LED B: LED的状态取反 C: 熄灭LED

Effective training objectives have three components: a statement of performance or outcome, a statement of quality or acceptable level of performance, and a statement of conditions under which the trainee is expected to perform.

发光强度在（）以下的LED叫做普通亮度LED，（）的LED叫做高亮度LED。

如果现在LED是熄灭状态，则执行 LED=~LED；语句后，LED的状态是（ ）

LED是单片机应用系统最为常见的输出设备，应用形式有（） A: 单个LED B: LED数码管 C: LED阵列 D: LED组

LED光源的分类，按结构分有：（） A: 直插式LED B: 表面贴装LED C: 食人鱼LED D: 大功率LED